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Marked coating composition and method for its authentication

a coating composition and authentication technology, applied in the field of coating composition authentication, can solve the problems of marker moieties (3a, inability to be easily removed or extracted, etc., and achieve the effect of effective marking of fashion articles

Inactive Publication Date: 2015-05-14
SICPA HLDG SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent describes a way to make coatings that can be used on banknotes and other valuable documents. These coatings have special molecules that are permanently attached to them, making them harder to remove or extract. This improves the effectiveness of the coatings in protecting against counterfeiting and other security threats. The coatings can also be used on other products, like electronic devices, to securely identify them and prevent them from being copied or counterfeited.

Problems solved by technology

Thus, the marker moieties (3a) are covalently bound to the coating composition component and cannot be easily removed or extracted, e.g. by common chemical treatments, e.g. using solvents or other easily available chemical extraction means.

Method used

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  • Marked coating composition and method for its authentication
  • Marked coating composition and method for its authentication
  • Marked coating composition and method for its authentication

Examples

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examples

[0177]For the purpose of further illustration of the present invention, in the following two examples of results achieved with the authentication method described herein are provided:

[0178]FIG. 3 shows exemplary results in the form of a GC-chromatogram and the MS spectrum of a marker as such, i.e. the reference substance according to step (S400) of FIG. 2, namely a GC-chromatogram and a MS-spectrum of the marker 4-fluoro phthalic anhydride (FPA) used for the marking (tagging) of a ink (as described in the example section below). The GC-chromatogram shows the characteristic retention time of the FPA. The MS spectrum shows the characteristic mass peaks pattern of the FPA, with the molecular peak of FPA at 166 and a peak at 122 corresponding to the loss of a carbon dioxide fragment.

[0179]FIG. 4 shows as further exemplary results the single ion chromatogram of an un-marked ink (upper chromatogram) and the corresponding single ion chromatogram of a FPA-tagged ink (lower chromatogram). In...

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Abstract

This invention relates to the field of authentication of coating compositions such as varnishes, inks and paints, and it is particularly useful in the field of authentication of such coating compositions when applied to substrates like banknotes or other valuable documents. It is particularly directed to a marked coating composition. e.g. an ink, that is marked with a marker (taggant) such as to allow for its authentication, and a method for authenticating such a marked coating composition. The marking is achieved by covalently binding a taggant to a coating composition component. e.g. such used for security documents. The taggant, which is not extractable through usual chemical treatments like washing methods or the use of solvents, can be detected and identified upon thermally induced chemical fragmentation with a PY-GC-MS apparatus. The marked ink or the marked substrate is thus authenticated as belonging to a particularly marked ink, varnish or batch.

Description

FIELD OF THE INVENTION[0001]The present invention relates to the field of authentication of coating compositions such as varnishes, inks and paints, and it is particularly useful in the field of authentication of such coating compositions when applied to substrates like banknotes or other valuable documents. It is particularly directed to a marked coating composition, e.g. an ink, that is marked with a marker (taggant) such as to allow for its authentication, and a method for authenticating such a marked coating composition.BACKGROUND OF THE INVENTION[0002]The authentication of products, i.e. the identification and / or verification of their origin, plays a critical role in a whole range of different industries and applications. It is known in the art to add so-called taggants, i.e. authenticable chemical components like specific markers, to products in order to allow for their identification and authentication.[0003]Marking of polymers for identification purposes, for example, is kno...

Claims

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Application Information

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IPC IPC(8): C09D7/12B42D25/36B42D25/405C09D11/03G01N31/12C09D7/63
CPCC09D7/1233C09D11/03B42D25/36B42D25/405G01N31/12G07D7/14C09D7/63Y10T428/24802B42D25/378B42D25/29B42D25/41
Inventor NOUZILLE, ERICDEMANGE, RAYNALDDEGOTT, PIERRE
Owner SICPA HLDG SA
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